Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
SUPER NINJA ENTERTAINMENT SYNTH
$5.99 · In-app purchases
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for SNESynth: Chiptune Power!: map the core Music workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Assumption to check: Limited sound customization options compared to desktop DAWs.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Complex interface for beginners.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Performance issues on older devices.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
SUPER NINJA ENTERTAINMENT SYNTH. SUPER FUN! Chiptune and 16-Bit video game synth. Uses real synthesis and samples from actual video game chips. ** Leads, Sound FX, Inspiration, and FUN – you're gonna find it in this app! NOW, YOU’RE PLAYING WITH SYNTH POWER! This app uses "real" synthesis, combined with samples for the ultimate creative control and authentic sound. “AUDIOKIT HAVE STRUCK GOLD, PROVIDING SOME OF THE THE MOST AUTHENTIC RETRO SYNTH SOUNDS YOU’LL EVER HEAR!” -- The GarageBand Guide, 5 star YouTube review ++ Over 400+ Presets to inspire you, including 240+ "Starter" sounds to make your own sound! ++ Exclusive Free Presets by Analog Matthew, Cokomairena, DMT Cymatics, Electronisounds, GarageBand Guide, Gavinski, Mark Hupkens, Moby Pixel, and more! FEATURES: • 2,500+ Samples packed into 240+ Multi-sampled PCM instruments! • Standalone app & iOS AUv3 Plugin • Over 350+ presets to inspire you • Fun free-running step sequencer • 16-bit Synth, Drum, and Sound FX sounds included • Over 1 GB of sounds compressed to under 120 Mb • Audio recording, record your sounds then export wav files! No other apps needed • Use with MIDI keyboard or iOS MIDI host • Ableton Link MORE FEATURES: • Use as an AUv3 (AudioUnit Plugin) in iOS DAWs such as Logic, GarageBand, Cubasis, AUM, more • Step Sequencer with “Magic Gate”, variable divisions, multiple oscillator & layer destinations • Traditional Synth Engine (including Pulse Width Modulation - PWM the heart of chiptune sounds) • On board RECORDING – easily record your melodies, and sounds and export! • LFO: Multiple waveforms + Re-trigger + 2 Destinations • Full ADSR (Attack, Decay, Sustain, Release for each layer) ++ Exclusive sounds made for this app... You can't get these sounds anywhere else! It's your secret sauce. + iPhone & iPad versions included for one low price More Info: www.audiokitpro.com/snesynth ** No video games themselves were sampled. The synthesis from vintage hardware sound chips was sampled. Plus, this app uses a "real" on board synth engine. This app does not sample any Nintendo, Super Nintendo, Sega, or Gameboy games. Nor does it have any affiliation with any of the companies or trademarks. We respect their pioneering work in sound design and have attempted to pay homage. We hope you enjoy the sounds and are able to be inspired! :) ### AudioKit is an open-source project intended to bring joy and music to people, and enlighten people on how to build custom instruments and iOS apps. All product names, images, and trademarks are the property of their respective ownes, which are in no way associated or affiliated with the creators of this app, including AudioKit, AudioKit Pro, LLC, and the other contributors. Product names are used solely for the purpose of identifying specific products related to hardware, synthesizers, sampling, sound design, and music-making. Use of these names and images does not imply any cooperation or endorsement. We thank them for their incredible hardware and instruments.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.